Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011 integer	Dec. 31, 2010	Dec. 31, 2009
Benefit Plans Details [Abstract]
Defined Contribution Plan Contributions	$ 22	$ 22	$ 22
Definted Benefit Plan General Disclosures [Abstract]
Number Of Defined Benefit Plans	26
Defined Benefit Plan Amounts Recognized In Balance Sheet Abstract
Accrued benefit liability - long-term	1,729	1,505
Defined Benefit Plan Assumptions Sensitivity To Changes [Abstract]
Increase of 1% in the discount rate	(40)
Decrease of 1% in the discount rate	42
Increase of 1% in the long-term rate of return on plan assets	(51)
Decrease of 1% in the long-term rate of return on plan assets	51
U.S. [Member]
Defined Benefit Plan Change In Benefit Obligation Roll Forward
Benefit obligation at beginning of year	608	549
Service cost	8	7	6
Interest cost	33	32	32
Employee contributions	0	0
Plan amendments	0	11
Plan curtailments	0	0
Plan settlements	0	0
Benefits paid	(30)	(30)
Business combinations	365	0
Actuarial loss (gain)	60	39
Effect of foreign currency exchange rate change	0	0
Benefit obligation as of December 31	1,044	608	549
Defined Benefit Plan Change In Fair Value Of Plan Assets Roll Forward
Fair value of plan assets at beginning of year	413	368
Defined Benefit Plan Actual Return On Plan Assets Abstract
Actual return on plan assets	6	46
Employer contributions	37	29
Employee contributions	0	0
Plan settlements	0	0
Benefits paid	(30)	(30)
Business combinations	336	0
Effect of foreign currency exchange rate change	0	0
Fair value of plan assets as of December 31	762	413	368
Defined Benefit Plan Funded Status Of Plan Abstract
Funded status as of December 31	(282)	(195)
Defined Benefit Plan Amounts Recognized In Balance Sheet Abstract
Noncurrent assets	0	0
Accrued benefit liability - current	1	0
Accrued benefit liability - long-term	281	195
Net amount recognized at end of year	(282)	(195)
Accumulated Benefit Obligation Disclosure [Abstract]
Accumulated Benefit Obligation	1,020	592
Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Abstract
Projected benefit obligation	1,044	608
Accumulated benefit obligation	1,020	592
Fair value of plan assets	762	413
Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Abstract
Projected benefit obligation	1,044	608
Fair value of plan assets	762	413
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation Abstract
Discount rates	4.67%	5.38%
Rates of compensation increase	3.94%
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost Abstract
Discount rate	5.38%	5.92%
Expected long-term rate of return on plan assets	7.49%	8.00%
Rate of compensation increase	3.94%
Defined Benefit Plan Assumptions Used In Calculations Abstract
Defined Benefit Plan Benefit Obligation Subsidiary Using Salary Bands	679	607
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	8	7	6
Interest cost	33	32	32
Expected return on plan assets	(33)	(30)	(24)
Amortization of initial net asset	0	0	0
Amortization of prior service cost	4	3	4
Amortization of net loss	13	12	16
Loss on curtailment	0	0	0
Settlement gain recognized	0	0	0
Total pension cost	25	24	34
Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax Abstract
Prior service cost	0
Unrecognized net actuarial loss	0
Total	0
Defined Benefit Plan Amounts That Will Be Amortized From Accumulated Other Comprehensive Income Loss In Next Fiscal Year Abstract
Prior service cost	0
Unrecognized net actuarial gain (loss)	0
Total	0
Equity Securities Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Equity Securities	46.00%
Debt Securities Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Debt Securities	39.00%
Real Estate Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Real Estate	0.00%
Other Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Other	15.00%
Defined Benefit Plan Weighted Average Asset Allocations Abstract
Equity securities	42.07%	53.51%
Debt securities	38.53%	25.91%
Real estate	0.00%	0.00%
Other	19.40%	20.58%
Total pension assets	100.00%	100.00%
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	762	413	368
Defined Benefit Plan Estimated Future Benefit Payments Abstract
Expected employer contribution in 2012	49
2012	55
2013	56
2014	58
2015	59
2016	61
2017 - 2021	325
U.S. [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	669	361
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	669	361
U.S. [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	93	52
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	93	52
U.S. [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Equity Securities Common Stock [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	120	146
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	120	146
U.S. [Member] \| Equity Securities Common Stock [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	120	146
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	120	146
U.S. [Member] \| Equity Securities Common Stock [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Equity Securities Common Stock [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Equity securities Mutual funds [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	140	39
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	140	39
U.S. [Member] \| Equity securities Mutual funds [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	140	39
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	140	39
U.S. [Member] \| Equity securities Mutual funds [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Equity securities Mutual funds [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| U.S. Government debt securities [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	31	32
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	31	32
U.S. [Member] \| U.S. Government debt securities [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	31	32
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	31	32
U.S. [Member] \| U.S. Government debt securities [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| U.S. Government debt securities [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Corporate debt securities [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	114	62
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	114	62
U.S. [Member] \| Corporate debt securities [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	114	62
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	114	62
U.S. [Member] \| Corporate debt securities [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Corporate debt securities [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Debt securities Mutual funds [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	135	2
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	135	2
U.S. [Member] \| Debt securities Mutual funds [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	135	2
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	135	2
U.S. [Member] \| Debt securities Mutual funds [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Debt securities Mutual funds [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Other debt securities [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	14	11
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	14	11
U.S. [Member] \| Other debt securities [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	14	11
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	14	11
U.S. [Member] \| Other debt securities [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Other debt securities [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Cash and cash equivalents [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	43	69
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	43	69
U.S. [Member] \| Cash and cash equivalents [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	43	69
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	43	69
U.S. [Member] \| Cash and cash equivalents [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Cash and cash equivalents [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
U.S. [Member] \| Other Plan Investments [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	165	52
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	165	52
U.S. [Member] \| Other Plan Investments [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	72	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	72	0
U.S. [Member] \| Other Plan Investments [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	93	52
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	93	52
U.S. [Member] \| Other Plan Investments [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member]
Defined Benefit Plan Change In Benefit Obligation Roll Forward
Benefit obligation at beginning of year	5,986	5,129
Service cost	19	16	12
Interest cost	564	510	458
Employee contributions	5	5
Plan amendments	0	0
Plan curtailments	5	0
Plan settlements	0	(2)
Benefits paid	(465)	(409)
Business combinations	0	14
Actuarial loss (gain)	371	474
Effect of foreign currency exchange rate change	(696)	249
Benefit obligation as of December 31	5,789	5,986	5,129
Defined Benefit Plan Change In Fair Value Of Plan Assets Roll Forward
Fair value of plan assets at beginning of year	4,730	4,042
Defined Benefit Plan Actual Return On Plan Assets Abstract
Actual return on plan assets	486	742
Employer contributions	175	156
Employee contributions	5	5
Plan settlements	0	(2)
Benefits paid	(465)	(409)
Business combinations	0	0
Effect of foreign currency exchange rate change	(531)	196
Fair value of plan assets as of December 31	4,400	4,730	4,042
Defined Benefit Plan Funded Status Of Plan Abstract
Funded status as of December 31	(1,389)	(1,256)
Defined Benefit Plan Amounts Recognized In Balance Sheet Abstract
Noncurrent assets	20	32
Accrued benefit liability - current	4	4
Accrued benefit liability - long-term	1,405	1,284
Net amount recognized at end of year	(1,389)	(1,256)
Accumulated Benefit Obligation Disclosure [Abstract]
Accumulated Benefit Obligation	5,724	5,927
Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Abstract
Projected benefit obligation	5,478	5,697
Accumulated benefit obligation	5,423	5,651
Fair value of plan assets	4,072	4,410
Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Abstract
Projected benefit obligation	5,492	5,704
Fair value of plan assets	4,084	4,415
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation Abstract
Discount rates	9.52%	9.82%
Rates of compensation increase	5.98%	5.99%
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost Abstract
Discount rate	9.82%	10.56%
Expected long-term rate of return on plan assets	11.08%	11.14%
Rate of compensation increase	5.98%	5.99%
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	19	16	12
Interest cost	564	510	458
Expected return on plan assets	(508)	(427)	(373)
Amortization of initial net asset	0	(1)	(2)
Amortization of prior service cost	0	0	0
Amortization of net loss	23	38	6
Loss on curtailment	5	0	0
Settlement gain recognized	0	1	0
Total pension cost	103	137	101
Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax Abstract
Prior service cost	(2)
Unrecognized net actuarial loss	1,112
Total	(1,114)
Defined Benefit Plan Amounts That Will Be Amortized From Accumulated Other Comprehensive Income Loss In Next Fiscal Year Abstract
Prior service cost	0
Unrecognized net actuarial gain (loss)	(40)
Total	(40)
Equity Securities Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Equity Securities Range Minimum	15.00%
Defined Benefit Plan Target Allocation Percentage Of Assets Equity Securities Range Maximum	30.00%
Debt Securities Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Debt Securities Range Minimum	59.00%
Defined Benefit Plan Target Allocation Percentage Of Assets Debt Securities Range Maximum	85.00%
Real Estate Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Real Estate Range Minimum	0.00%
Defined Benefit Plan Target Allocation Percentage Of Assets Real Estate Range Maximum	4.00%
Other Abstract
Defined Benefit Plan Target Allocation Percentage Of Assets Other Range Minimum	0.00%
Defined Benefit Plan Target Allocation Percentage Of Assets Other Range Maximum	6.00%
Defined Benefit Plan Weighted Average Asset Allocations Abstract
Equity securities	23.48%	22.43%
Debt securities	72.55%	73.64%
Real estate	2.34%	2.09%
Other	1.63%	1.84%
Total pension assets	100.00%	100.00%
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	4,400	4,730	4,042
Defined Benefit Plan Estimated Future Benefit Payments Abstract
Expected employer contribution in 2012	174
2012	421
2013	435
2014	451
2015	465
2016	483
2017 - 2021	2,657
Foreign [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	584	648
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	584	648
Foreign [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	3,061	3,379
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	3,061	3,379
Foreign [Member] \| Level 3 [Member]
Defined Benefit Plan Change In Fair Value Of Plan Assets Roll Forward
Fair value of plan assets at beginning of year	703	564
Defined Benefit Plan Actual Return On Plan Assets Abstract
Returns relating to assets still held at reporting date	167	104
Returns relating to assets sold during the period	28	0
Purchases, sales and settlements, net	(48)	3
Effect of foreign currency exchange rate change	(95)	32
Fair value of plan assets as of December 31	755	703
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	755	703
Foreign [Member] \| Equity Securities Common Stock [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	26	30
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	26	30
Foreign [Member] \| Equity Securities Common Stock [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	26	30
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	26	30
Foreign [Member] \| Equity Securities Common Stock [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Equity Securities Common Stock [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Equity securities Mutual funds [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	427	510
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	427	510
Foreign [Member] \| Equity securities Mutual funds [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	427	510
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	427	510
Foreign [Member] \| Equity securities Mutual funds [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Equity securities Mutual funds [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Private equity funds [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	580	521
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	580	521
Foreign [Member] \| Private equity funds [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Private equity funds [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Private equity funds [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	580	521
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	580	521
Foreign [Member] \| Debt securities Mutual funds [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	2,930	3,215
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	2,930	3,215
Foreign [Member] \| Debt securities Mutual funds [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	125	108
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	125	108
Foreign [Member] \| Debt securities Mutual funds [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	2,805	3,107
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	2,805	3,107
Foreign [Member] \| Debt securities Mutual funds [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Certificates of deposit [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	5	4
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	5	4
Foreign [Member] \| Certificates of deposit [Member] \| Level 1 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Certificates of deposit [Member] \| Level 2 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	5	4
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	5	4
Foreign [Member] \| Certificates of deposit [Member] \| Level 3 [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	0	0
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	0	0
Foreign [Member] \| Unsecured Debentures [Member]
Defined Benefit Plan Actual Return On Plan Assets Abstract
Fair value of plan assets as of December 31	20	19
Defined Benefit Plan Information About Plan Assets Abstract
Fair value of plan assets	20	19
Foreign [Member] \| Unsecured Debentures [Member] \| Level 1 [Member]

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- Definition

Represents the benefit obligation (the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date) of a subsidiary which uses salary bands to determine future benefit costs rather than a rate of compensation increase

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Represents the impact on pension expense that would result from a one percentage point decrease in the discount rate assumptions for defined benefit pension plans

+ References

No definition available.

+ Details

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- Definition

Represents the impact on pension expense that would result from a one percentage point decrease in the long-term rate of return on plan asset assumptions for defined benefit pension plans

+ References

No definition available.

+ Details

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- Definition

Represents the impact on pension expense that would result from a one percentage point increase in the discount rate assumptions for defined benefit pension plans

+ References

No definition available.

+ Details

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- Definition

Represents the impact on pension expense that would result from a one percentage point increase in the long-term rate of return on plan asset assumptions for defined benefit pension plans

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Represents the number of defined benefit plans covering the employees at certain subsidiaries

+ References

No definition available.

+ Details

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- Definition

The amount of the contributions made during the period to defined contribution plans

+ References

No definition available.

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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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Actual return on plan assets, separately identifying the amount related to assets sold during the period.

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The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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The amounts in accumulated other comprehensive income related to transition assets (obligations), origination from the adoption of FAS 87 and 106, expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

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The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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The amount for overfunded plans recognized in the balance sheet as a noncurrent asset associated with a defined benefit pension plan or other postretirement defined benefit plan.

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The interest rate used to adjust for the time value of money for the plan.

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Expected rate of compensation increases (for pay-related plans).

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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The percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.

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The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

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The amount of the benefits expected to be paid in Year 5.

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The amount of the benefits expected to be paid in Year 4.

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The amount of the benefits expected to be paid in Year 1.

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The amount of the benefits expected to be paid in Year 3.

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The amount of the benefits expected to be paid in Year 2.

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An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The amount of increase or decrease in the benefit obligation attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The percentage of the fair value of investments other than debt securities, equity securities, and real estate to the fair value of total plan assets held as of the measurement date.

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If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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The aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.

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For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

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