Restructuring Related Activities (Details) - USD ($) $ in Millions	3 Months Ended		22 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	$ 15	$ 15
Restructuring and Related Cost, Incurred Cost	28	19
Restructuring Charges	13	4
2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date			$ 77
Restructuring-related Costs Incurred to Date			92
Estimated costs of restructuring program by major type of cost
Restructuring and Related Cost, Cost Incurred to Date	169		169
Payments for Restructuring	(25)		(122)
Termination Benefits [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0
Restructuring and Related Cost, Incurred Cost	12	3
Restructuring Charges	12	3
Termination Benefits [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Reserve	27		27	$ 22
Restructuring Charges Incurred to Date			61
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(8)		(36)
Restructuring Charges	12
Accelerated depreciation [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses		2
Restructuring and Related Cost, Incurred Cost		2
Restructuring Charges		0
Accelerated depreciation [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date			9
Transfer costs [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	7	12
Restructuring and Related Cost, Incurred Cost	7	12
Restructuring Charges	0	0
Transfer costs [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring-related Costs Incurred to Date			68
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(7)		(67)
Other [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	8	1
Restructuring and Related Cost, Incurred Cost	8	2
Restructuring Charges	1	1
Other [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring Charges Incurred to Date			16
Restructuring-related Costs Incurred to Date			15
Estimated costs of restructuring program by major type of cost
Payments for Restructuring	(9)		(19)
Minimum [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	275		275
Estimated costs of restructuring program by major type of cost
Restructuring plan estimated future cash outflow	250
Minimum [Member] | Restructuring Plan [Member] | Termination Benefits [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	100		100
Minimum [Member] | Restructuring Plan [Member] | Other [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	25		25
Minimum [Member] | Restructuring Related To Plan [Member] | Other [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	150		150
Maximum [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	325		325
Estimated costs of restructuring program by major type of cost
Restructuring plan estimated future cash outflow	300
Maximum [Member] | Restructuring Plan [Member] | Termination Benefits [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	110		110
Maximum [Member] | Restructuring Plan [Member] | Other [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	50		50
Maximum [Member] | Restructuring Related To Plan [Member] | Other [Member] | 2016 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Expected Cost	165		$ 165
Cost of Sales [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	7	12
Cost of Sales [Member] | Termination Benefits [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0
Cost of Sales [Member] | Accelerated depreciation [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses		0
Cost of Sales [Member] | Transfer costs [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	7	12
Cost of Sales [Member] | Other [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0
Selling, General and Administrative Expenses [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	8	3
Selling, General and Administrative Expenses [Member] | Termination Benefits [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0
Selling, General and Administrative Expenses [Member] | Accelerated depreciation [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses		2
Selling, General and Administrative Expenses [Member] | Transfer costs [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	0	0
Selling, General and Administrative Expenses [Member] | Other [Member]
Estimated costs of restructuring program by major type of cost
Restructuring Related Expenses	$ 8	$ 1