Commitments and Contingencies (Schedule of Product Warranty Reserves) (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at January 1	$ 320	$ 493
Issuances/accruals during the period	252	228
Settlements made during the period/other	(296)	(363)
Balance at September 30	276	358
Current portion			$ 203	$ 297
Non-current portion			73	61
Total	320	493	276	358
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	251	228
Settlements made during the period/other	(226)	(218)
Balance at September 30	276	249
Current portion			203	188
Non-current portion			73	61
Total	251	239	276	249
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)	(145)
Balance at September 30	0	109
Current portion			0	109
Non-current portion			0	0
Total	$ 69	$ 254	$ 0	$ 109

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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