Commitments and Contingencies (Schedule of Product Warranty and Recall Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at January 1	$ 320	$ 493
Issuances/accruals during the period	332	316
Settlements made during the period/other	(375)	(489)
Balance at December 31	277	320
Current portion			$ 203	$ 258
Non-current portion			74	62
Total	320	493	277	320
Product Warranty
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at January 1	251	239
Issuances/accruals during the period	331	316
Settlements made during the period/other	(305)	(304)
Balance at December 31	277	251
Current portion			203	189
Non-current portion			74	62
Total	251	239	277	251
Legacy Product Warranty
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at January 1	69	254
Issuances/accruals during the period	1	0
Settlements made during the period/other	(70)	(185)
Balance at December 31	0	69
Current portion			0	69
Non-current portion			0	0
Total	$ 69	$ 254	$ 0	$ 69

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

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Amount of increase in the standard and extended product warranty accrual from warranties issued.

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