Additional interest charges for note repurchase premiums and the write-off of unamortized finance fees.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Weighted average interest rate of debt outstanding.

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Gross amount of debt extinguished.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount of long-term debt and lease obligation, including portion classified as current.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Debt (Details) $ / shares in Units, € in Millions, $ in Millions	1 Months Ended			3 Months Ended	6 Months Ended
	May 31, 2020 USD ($)	Nov. 30, 2019 EUR (€)	Jul. 31, 2019 EUR (€)	Jun. 30, 2020 USD ($) item $ / shares	Jun. 30, 2020 USD ($) item agreement $ / shares	Dec. 31, 2021 item	Jun. 30, 2021 item	Jun. 30, 2020 EUR (€) item	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Jun. 30, 2019 USD ($)	Jun. 30, 2019 EUR (€)
Debt Instrument
Total long-term debt				$ 6,376	$ 6,376				$ 5,484		$ 6,265
Less amounts due within one year				273	273				49		30
Long-term debt				6,103	$ 6,103				5,435		6,235
Number financial maintenance covenants \| agreement					1
Maximum Leverage Ratio may increase \| item					0.5
Maximum
Debt Instrument
Maximum Borrowing Capacity				$ 3,000	$ 3,000
Leverage Ratio \| item				5.0	5.0			5.0
Maximum \| Forecast
Debt Instrument
Leverage Ratio \| item						4.50	4.75
Secured Credit Agreement
Debt Instrument
Unused Credit				$ 667	$ 667
Weighted average interest rate (as a percent)				1.64%	1.64%			1.64%
Secured Credit Agreement \| Minimum
Debt Instrument
Interest rate margin, Eurocurrency Rate loans (as a percent)				1.00%	1.00%			1.00%
Interest rate margin, Base Rate loans (as a percent)					0.00%
Secured Credit Agreement \| Maximum
Debt Instrument
Interest rate margin, Eurocurrency Rate loans (as a percent)				1.50%	1.50%			1.50%
Interest rate margin, Base Rate loans (as a percent)					0.50%
Revolving Loans
Debt Instrument
Total long-term debt				$ 823	$ 823						389
Term Loan A
Debt Instrument
Total long-term debt				1,477	1,477				1,477		1,496
Face Value				1,500	1,500
Net proceeds, after deducting debt issuance costs					1,477
Other secured debt
Debt Instrument
Total long-term debt				225	225				333		454
Debt redeemed	$ 105
Senior Notes
Debt Instrument
Additional interest charges for note repurchase premiums and write-off of unamortized finance fees				$ 38	$ 38
Senior Notes 6.75%, due 2020 (500 million EUR)
Debt Instrument
Total long-term debt											567	€ 500
Interest rate, stated percentage		6.75%	6.75%	6.75%	6.75%			6.75%
Debt redeemed \| €		€ 250	€ 250
4.875%, due 2021 (0 million EUR at June 30, 2020, 132 million EUR December 31, 2019 and 330 million EUR at June 30, 2019)
Debt Instrument
Total long-term debt								€ 0	132	€ 118	374	330
Interest rate, stated percentage	4.875%	4.875%		4.875%	4.875%			4.875%
Debt redeemed	$ 130	€ 212
Senior Notes 5.00%, due 2022
Debt Instrument
Total long-term debt				$ 81	$ 81				497		497
Interest rate, stated percentage	5.00%			5.00%	5.00%			5.00%
Debt redeemed	$ 419
Fair values of fixed rate debt obligations
Principal Amount				$ 81	$ 81
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 100.35	$ 100.35
Fair Value				$ 81	$ 81
Senior Notes 4.00%, due 2023
Debt Instrument
Total long-term debt				$ 307	$ 307				307		307
Interest rate, stated percentage				4.00%	4.00%			4.00%
Fair values of fixed rate debt obligations
Principal Amount				$ 310	$ 310
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 98.61	$ 98.61
Fair Value				$ 306	$ 306
Senior Notes 5.875%, due 2023
Debt Instrument
Total long-term debt				$ 690	$ 690				689		689
Interest rate, stated percentage				5.875%	5.875%			5.875%
Fair values of fixed rate debt obligations
Principal Amount				$ 700	$ 700
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 103.07	$ 103.07
Fair Value				$ 722	$ 722
Senior Notes 3.125%, due 2024 (725 million EUR)
Debt Instrument
Total long-term debt				$ 835	$ 835			€ 725	824	725	845	€ 725
Interest rate, stated percentage				3.125%	3.125%			3.125%
Fair values of fixed rate debt obligations
Principal Amount				$ 815	$ 815			€ 725
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 98.74	$ 98.74
Fair Value				$ 804	$ 804
Senior Notes 6.375%, due 2025
Debt Instrument
Total long-term debt				$ 296	$ 296				295		296
Interest rate, stated percentage				6.375%	6.375%			6.375%
Fair values of fixed rate debt obligations
Principal Amount				$ 300	$ 300
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 104.61	$ 104.61
Fair Value				$ 314	$ 314
Senior Notes, 5.375% due 2025
Debt Instrument
Total long-term debt				$ 297	$ 297				297		298
Interest rate, stated percentage				5.375%	5.375%			5.375%
Fair values of fixed rate debt obligations
Principal Amount				$ 300	$ 300
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 100.39	$ 100.39
Fair Value				$ 301	$ 301
Senior Notes 2.875%, due 2025 (500 million EUR)
Debt Instrument
Total long-term debt		€ 500		$ 554	$ 554			€ 500	552	€ 500
Interest rate, stated percentage		2.875%		2.875%	2.875%			2.875%
Net proceeds, after deducting debt issuance costs \| €		€ 492
Fair values of fixed rate debt obligations
Principal Amount				$ 562	$ 562			€ 500
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 96.92	$ 96.92
Fair Value				$ 545	$ 545
Senior Notes 6.625%, due 2027
Debt Instrument
Total long-term debt	$ 700			$ 691	$ 691
Interest rate, stated percentage	6.625%			6.625%	6.625%			6.625%
Net proceeds, after deducting debt issuance costs	$ 690
Fair values of fixed rate debt obligations
Principal Amount				$ 700	$ 700
Indicated Market Price $ (in dollars per share) \| $ / shares				$ 104.15	$ 104.15
Fair Value				$ 729	$ 729
Finance leases
Debt Instrument
Total long-term debt				88	88				70		41
Other
Debt Instrument
Total long-term debt				12	12				$ 11		$ 12
Revolving Credit Facility
Debt Instrument
Total long-term debt				300	$ 300
Additional default interest rate per annum applied to all obligations owed under the Agreement					2.00%
Revolving Credit Facility \| Minimum
Debt Instrument
Facility fee payable (as a percent)					0.20%
Revolving Credit Facility \| Maximum
Debt Instrument
Facility fee payable (as a percent)					0.30%
Multicurrency Revolving Credit Facility
Debt Instrument
Total long-term debt				$ 1,200	$ 1,200