Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block]

	Defined Benefit Pension Plans		Retiree Health Benefit Plans
	2011	2010		2011	2010
Change in benefit obligation
Benefit obligation at beginning of year	$8,115.0	$7,553.9		$2,088.5	$2,032.8
Service cost	236.3	219.2		72.4	56.5
Interest cost	447.9	431.6		118.0	121.4
Actuarial loss	794.7	342.2		110.2	10.0
Benefits paid	(400.1)	(387.8)		(77.9)	(98.0)
Plan amendments	10.0	0.3		1.1	(64.2)
Foreign currency exchange rate changes     and other adjustments	(12.6)	(44.4)		(3.7)	30.0
Benefit obligation at end of year	$9,191.2	$8,115.0		$2,308.6	$2,088.5

Schedule of Changes in Fair Value of Plan Assets [Table Text Block]

	Defined Benefit Pension Plans		Retiree Health Benefit Plans
	2011	2010		2011	2010
Change in plan assets
Fair value of plan assets at   beginning of year	$6,983.0	$6,008.5		$1,327.7	$1,180.7
Actual return on plan assets	209.2	818.3		16.6	152.2
Employer contribution	402.4	563.5		72.6	92.8
Benefits paid	(400.1)	(387.8)		(77.9)	(98.0)
Foreign currency exchange rate   changes and other adjustments	(8.2)	(19.5)		0.0	0.0
Fair value of plan assets at end of year	$7,186.3	$6,983.0		$1,339.0	$1,327.7

Schedule of Net Funded Status [Table Text Block]

	Defined Benefit Pension Plans		Retiree Health Benefit Plans
	2011	2010		2011	2010
Funded status	$(2,004.9)	$(1,132.0)		$  (969.6)	$  (760.8)
Unrecognized net actuarial loss	4,857.5	3,796.6		1,367.4	1,235.3
Unrecognized prior service cost(benefit)	57.3	56.1		(215.1)	(261.1)
Net amount recognized	$ 2,909.9	$ 2,720.7		$   182.7	$213.4

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

	Defined Benefit Pension Plans		Retiree Health Benefit Plans
	2011	2010		2011	2010
Amounts recognized in the consolidated   balance sheet consisted of
Prepaid expenses and other	$    160.8	$     58.5		$       0.0	$0.0
Other current liabilities	(57.5)	(54.7)		(9.3)	(9.2)
Accrued retirement benefit	(2,108.2)	(1,135.8)		(960.3)	(751.6)
Accumulated other comprehensive     loss before income taxes	4,914.8	3,852.7		1,152.3	974.2
Net amount recognized	$2,909.9	$2,720.7		$   182.7	$213.4

Schedule of Assumptions Used [Table Text Block]

	Defined Benefit Pension Plans			Retiree Health Benefit Plans
(Percents)	2011	2010	2009	2011	2010	2009
Weighted-average assumptions   as of December 31
Discount rate for benefit obligation	5.0	5.6	5.9	5.1	5.8	6.0
Discount rate for net benefit costs	5.6	5.9	6.7	5.8	6.0	6.9
Rate of compensation increase for benefit     obligation	3.7	3.7	3.7
Rate of compensation increase for net     benefit costs	3.7	3.7	4.1
Expected return on plan assets for net     benefit costs	8.5	8.8	8.8	8.8	9.0	9.0

Schedule of Expected Benefit Payments [Table Text Block]

	2012	2013	2014	2015	2016	2017-2021
Defined benefit pension plans	$416.1	$424.2	$437.2	$449.9	$464.2	$2,609.2
Retiree health benefit plans-gross	$118.7	$119.1	$123.6	$127.3	$135.2	$790.8
Medicare rebates	(11.7)	(9.9)	(11.0)	(12.4)	(13.5)	(91.7)
Retiree health benefit plans-net	$107.0	$109.2	$112.6	$114.9	$121.7	$  699.1

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	Defined Benefit Pension Plans	Retiree Health Benefit Plans
Actuarial loss arising during period	$1,266.0	$221.3
Plan amendments during period	10.0	1.1
Amortization of prior service cost (benefit) included in   net income	(8.6)	42.9
Amortization of net actuarial loss included in net   income	(200.4)	(88.7)
Foreign currency exchange rate changes	(4.9)	1.5
Total other comprehensive loss during period	$1,062.1	$178.1

Schedule of Allocation of Plan Assets [Table Text Block]

			Fair Value Measurements Using
Asset Class	Total	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Defined Benefit Pension Plans
Public equity securities         U.S.	$    454.5	$   317.2		$   137.3	$
International	1,462.4	505.9		956.5
Fixed income       Developed markets	929.1	100.9		828.2
Emerging markets	341.5	0.1		341.4
Private alternative investments       Hedge funds	2,312.6			1,064.2	1,248.4
Equity-like funds	870.2				870.2
Real estate	409.2	271.2			138.0
Other	406.8	177.7		229.1
Total	$7,186.3	$1,373.0		$3,556.7	$2,256.6
Retiree Health Benefit Plans
Public equity securities       U.S.	$    40.9	$28.0		$      12.9	$
International	97.1	27.5		69.6
Fixed income       Developed markets	55.3			55.3
Emerging markets	34.6			34.6
Private alternative investments       Hedge funds	213.1			107.8	105.3
Equity-like funds	79.9				79.9
Cash value of trust owned insurance contract	767.9			767.9
Real estate	27.5	27.5
Other	22.7	8.6		14.1
Total	$1,339.0	$91.6		$1,062.2	$185.2

			Fair Value Measurements Using
Asset Class	Total	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Defined Benefit Pension Plans
Public equity securities         U.S.	$   589.4	$   421.4		$   168.0	$
International	1,868.3	907.1		961.2
Fixed income       Developed markets	791.6	77.6		714.0
Emerging markets	336.2			336.2
Private alternative investments       Hedge funds	2,020.3			778.4	1,241.9
Equity-like funds	812.9	10.0			802.9
Real estate	126.5				126.5
Other	437.8	195.9		241.9
Total	$6,983.0	$1,612.0		$3,199.7	$2,171.3
Retiree Health Benefit Plans
Public equity securities       U.S.	$     56.0	$     39.7		$     16.3	$
International	131.6	67.8		63.8
Fixed income       Developed markets	50.5			50.5
Emerging markets	33.9			33.9
Private alternative investments       Hedge funds	185.2			78.6	106.6
Equity-like funds	74.5				74.5
Cash value of trust owned insurance contract	761.7			761.7
Other	34.3	12.6		21.7
Total	$1,327.7	$120.1		$1,026.5	$181.1

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Hedge Funds	Equity-like  Funds	Real  Estate	Total
Defined Benefit Pension Plans
Beginning balance at January 1, 2011	$1,241.9	$802.9	$126.5	$2,171.3
Actual return on plan assets, including changes in foreign exchange rates:
Relating to assets still held at the reporting date	(8.1)	34.4	3.9	30.2
Relating to assets sold during the period	(18.1)	0.0	0.0	(18.1)
Purchases	217.7	159.1	11.5	388.3
Sales	(25.2)	0.0	(3.9)	(29.1)
Settlements	(159.8)	(126.2)	0.0	(286.0)
Ending balance at December 31, 2011	$1,248.4	$870.2	$138.0	$2,256.6
Retiree Health Benefit Plans
Beginning balance at January 1, 2011	$106.6	$74.5		$181.1
Actual return on plan assets, including changes in foreign exchange rates:
Relating to assets still held at the reporting date	0.5	3.3		3.8
Relating to assets sold during the period	(1.8)	0.0		(1.8)
Purchases	18.2	14.4		32.6
Sales	(2.0)	0.0		(2.0)
Settlements	(16.2)	(12.3)		(28.5)
Ending balance at December 31, 2011	$105.3	$79.9		$185.2

	Hedge Funds	Equity-like Funds	Inter-national Equity	Fixed Income- Developed Markets	Real Estate	Total
Defined Benefit Pension Plans
Beginning balance at January 1, 2010	$1,381.5	$658.2	$ 3.9	$ 3.5	$85.4	$2,132.5
Actual return on plan assets, including   changes in foreign exchange rates:
Relating to assets still held at the reporting date	106.1	66.2	0.1	0.1	4.2	176.7
Relating to assets sold during the period	0.0	11.3	(0.4)	(0.1)	(5.3)	5.5
Purchases	215.8	131.4	0.1	0.0	41.4	388.7
Sales	(21.4)	0.0	(3.1)	(3.4)	0.0	(27.9)
Settlements	(18.1)	(64.2)	0.0	(0.1)	0.0	(82.4)
Transfers in and/or out of Level 3	(422.0)	0.0	(0.6)	0.0	0.8	(421.8)
Ending balance at December 31, 2010	$1,241.9	$802.9	$ 0.0	$ 0.0	$126.5	$2,171.3
Retiree Health Benefit Plans
Beginning balance at January 1, 2010	$   140.9	$   63.6	$ 0.4	$ 0.4	$   0.0	$  205.3
Actual return on plan assets, including   changes in foreign exchange rates:
Relating to assets still held at the reporting date	5.4	4.6	0.0	0.0	0.0	10.0
Relating to assets sold during the period	0.0	0.6	0.0	0.0	0.0	0.6
Purchases	5.3	11.9	0.0	0.0	0.0	17.2
Sales	(0.6)	0.0	(0.4)	(0.4)	0.0	(1.4)
Settlements	(1.8)	(6.2)	0.0	0.0	0.0	(8.0)
Transfers in and/or out of Level 3	(42.6)	0.0	0.0	0.0	0.0	(42.6)
Ending balance at December 31, 2010	$   106.6	$   74.5	$  0.0	$ 0.0	$   0.0	$  181.1

Pension Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Defined Benefit Pension Plans			Retiree Health Benefit Plans
	2011	2010	2009	2011	2010	2009
Components of net periodic     benefit cost
Service cost	$236.3	$219.2	$242.1	$  72.4	$   56.5	$  53.7
Interest cost	447.9	431.6	417.5	118.0	121.4	119.6
Expected return on plan assets	(685.9)	(638.2)	(584.9)	(129.4)	(122.6)	(117.9)
Amortization of prior service         cost(benefit)	8.6	8.8	8.0	(42.9)	(37.2)	(36.0)
Recognized actuarial loss	200.4	163.0	84.5	88.7	85.0	71.8
Net periodic benefit cost	$207.3	$184.4	$167.2	$106.8	$103.1	$  91.2