Reclassifications From Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassifications from accumulated other comprehensive (loss) income
Other income (expense), net	$ 47	$ 38		$ 135	$ 129
Interest expense	39	38		119	117
Tax (benefit)	73	67		202	188
Reclassifications, after tax	(138)	(191)		(517)	(576)
Reclassification of disproportionate tax effects			$ 0
Accounting Standards Update 2018-02
Reclassifications from accumulated other comprehensive (loss) income
Reclassification of disproportionate tax effects					59
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses, net
Reclassifications from accumulated other comprehensive (loss) income
Other income (expense), net	5	5		16	15
Tax (benefit)	(1)	(1)		(4)	(3)
Reclassifications, after tax	4	4		12	12
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Interest rate swaps
Reclassifications from accumulated other comprehensive (loss) income
Interest expense	0			1
Tax (benefit)	0			0
Reclassifications, after tax	$ 0			1
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Interest rate swaps
Reclassifications from accumulated other comprehensive (loss) income
Interest expense		0			1
Tax (benefit)		0			0
Reclassifications, after tax		$ 0			$ 1
UK Window Group | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications from accumulated other comprehensive (loss) income
Other income (expense), net				$ (14)