Debt (Details) $ / shares in Units, € in Millions, $ in Millions	1 Months Ended			9 Months Ended
	Mar. 31, 2017 USD ($)	Nov. 30, 2016 USD ($)	Aug. 31, 2015 USD ($)	Sep. 30, 2017 USD ($) item	Sep. 30, 2017 EUR (€)	Sep. 30, 2017 USD ($) $ / shares	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 USD ($)	Nov. 30, 2016 EUR (€)	Sep. 30, 2016 USD ($)	Feb. 03, 2016
Debt Instrument
Total long-term debt						$ 5,426				$ 5,166		$ 5,409
Less amounts due within one year						48				33		76
Long-term debt						5,378				5,133		5,333
Accounts receivable securitization
Short-term loans and long-term debt due within one year						243				195		262
Fair values of fixed rate debt obligations
Interest charges for note repurchase premiums and related write-off of unamortized finance fees	$ 17
New Agreement
Debt Instrument
Leverage ratio, period one													4.50%
Leverage ratio, period two													4.00%
Unused Credit						$ 652
Number financial maintenance covenants | item				1
Accounts receivable securitization
Weighted average interest rate, short-term debt (as a percent)					2.57%	2.57%
Revolving Loans
Debt Instrument
Total long-term debt						$ 200
Term Loan A
Debt Instrument
Total long-term debt						1,202				1,395		1,516
Face Value						1,575
Net proceeds, after deducting debt issuance costs				$ 1,202
Term Loan A (279 million EUR)
Debt Instrument
Total long-term debt					€ 279	308				282		303
Net proceeds, after deducting debt issuance costs				$ 308
Term Loan B
Debt Instrument
Total long-term debt												558
Senior Notes 6.75%, due 2020 (500 million EUR)
Debt Instrument
Total long-term debt					€ 500	$ 586				523		557
Interest rate, stated percentage					6.75%	6.75%
Fair values of fixed rate debt obligations
Principal Amount						$ 589
Indicated Market Price (in dollars per share) | $ / shares						$ 118.38
Fair Value						$ 697
Senior Notes 4.875%, due 2021 (330 million EUR)
Debt Instrument
Total long-term debt					€ 330	$ 386				345		367
Interest rate, stated percentage					4.875%	4.875%
Fair values of fixed rate debt obligations
Principal Amount						$ 389
Indicated Market Price (in dollars per share) | $ / shares						$ 113.85
Fair Value						$ 443
Senior Notes 5.00%, due 2022
Debt Instrument
Total long-term debt						$ 496				495		495
Interest rate, stated percentage					5.00%	5.00%
Fair values of fixed rate debt obligations
Principal Amount						$ 500
Indicated Market Price (in dollars per share) | $ / shares						$ 105.80
Fair Value						$ 529
Senior Notes 5.875%, due 2023
Debt Instrument
Total long-term debt						$ 684				682		681
Interest rate, stated percentage			5.875%		5.875%	5.875%
Face Value			$ 700
Fair values of fixed rate debt obligations
Principal Amount						$ 700
Indicated Market Price (in dollars per share) | $ / shares						$ 110.65
Fair Value						$ 775
Senior Notes 3.125%, due 2024 (725 million EUR at September 30,2017 and 500 million EUR at December 31,2016)
Debt Instrument
Total long-term debt					€ 725	$ 840			€ 500	520
Interest rate, stated percentage					3.125%	3.125%	3.125%	3.125%			3.125%
Face Value | €							€ 225				€ 500
Net proceeds, after deducting debt issuance costs	$ 237	$ 520
Fair values of fixed rate debt obligations
Principal Amount						$ 854
Indicated Market Price (in dollars per share) | $ / shares						$ 103.38
Fair Value						$ 883
Senior Notes, 5.375% due 2025
Debt Instrument
Total long-term debt						$ 295				294		294
Interest rate, stated percentage					6.375%	6.375%
Fair values of fixed rate debt obligations
Principal Amount						$ 300
Indicated Market Price (in dollars per share) | $ / shares						$ 106.98
Fair Value						$ 321
Senior Notes 6.375%, due 2025
Debt Instrument
Total long-term debt						$ 297				297		296
Interest rate, stated percentage			6.375%		5.375%	5.375%
Face Value			$ 300
Net proceeds, after deducting debt issuance costs			$ 972
Fair values of fixed rate debt obligations
Principal Amount						$ 300
Indicated Market Price (in dollars per share) | $ / shares						$ 113.10
Fair Value						$ 339
Senior Debentures 7.80%, due 2018
Debt Instrument
Total long-term debt						22				250		250
Long-term debt						$ 22
Interest rate, stated percentage					7.80%	7.80%	7.80%	7.80%
Face Value								$ 228
Fair values of fixed rate debt obligations
Principal Amount						$ 22
Indicated Market Price (in dollars per share) | $ / shares						$ 103.77
Fair Value						$ 23
Capital leases
Debt Instrument
Total long-term debt						54				57		62
Other debt
Debt Instrument
Total long-term debt						56				26		30
Revolving Credit Facility | New Agreement
Debt Instrument
Total long-term debt						300
Multicurrency Revolving Credit Facility | New Agreement
Debt Instrument
Total long-term debt						600
Accounts Receivable Securitization Program
Accounts receivable securitization
Short-term loans and long-term debt due within one year						$ 170				$ 152		$ 158
Weighted average interest rate, short-term debt (as a percent)					0.65%	0.65%			0.74%	0.74%		0.67%
European Accounts Receivable Securitization Program
Accounts receivable securitization
Maximum Borrowing Capacity | €					€ 185
Parent
Debt Instrument
Long-term debt										$ 250		$ 250
Accounts receivable securitization
Short-term loans and long-term debt due within one year						$ 22
Minimum | Secured Credit Agreement
Debt Instrument
Interest rate margin, Eurocurrency Rate loans (as a percent)					1.25%	1.25%
Interest rate margin, Base Rate loans (as a percent)				0.25%
Minimum | Revolving Credit Facility
Debt Instrument
Facility fee payable (as a percent)				0.20%
Maximum | Secured Credit Agreement
Debt Instrument
Interest rate margin, Eurocurrency Rate loans (as a percent)					1.75%	1.75%
Interest rate margin, Base Rate loans (as a percent)				0.75%
Maximum | Revolving Credit Facility
Debt Instrument
Facility fee payable (as a percent)				0.30%