Commitments and Contingencies (Schedule of Product Warranty and Recall Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at January 1	$ 277	$ 320
Issuances/accruals during the period	289	332
Settlements made during the period/other	(294)	(375)
Reclassification of product warranty to held for sale	(4)	0
Balance at December 31	268	277
Current portion			$ 194	$ 203
Non-current portion			74	74
Total	277	320	268	277
Product Warranty
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at January 1	277	251
Issuances/accruals during the period	289	331
Settlements made during the period/other	(294)	(305)
Reclassification of product warranty to held for sale	(4)	0
Balance at December 31	268	277
Current portion			194	203
Non-current portion			74	74
Total	277	251	268	277
Legacy Product Warranty
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at January 1	0	69
Issuances/accruals during the period	0	1
Settlements made during the period/other	0	(70)
Reclassification of product warranty to held for sale	0	0
Balance at December 31	0	0
Current portion			0	0
Non-current portion			0
Total	$ 0	$ 69	$ 0	$ 0

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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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.

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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).

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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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Standard and Extended Product Warranty Accrual, Reclassified To Held-For-Sale

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