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Financing Arrangements - Narrative (Details) € in Millions								9 Months Ended		22 Months Ended
Financing Arrangements - Narrative (Details) € in Millions	Aug. 09, 2019 USD ($)	Mar. 01, 2019 USD ($)	Feb. 27, 2019 EUR (€)	Feb. 27, 2019 USD ($)	Feb. 26, 2019 USD ($)	Apr. 26, 2018 USD ($)	Sep. 27, 2017	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Aug. 06, 2019 USD ($)	Sep. 30, 2019 BRL (R$)	Sep. 30, 2019 USD ($)	Aug. 05, 2019 EUR (€)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Repayments of long-term debt								$ 946,000,000	$ 381,000,000
Letter of Credit Subfacility Maturing 2022
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity											R$ 1,000,000,000.0	$ 240,000,000			$ 258,000,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit outstanding												0			0
Line of Credit \| Foreign Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity \| €													€ 250
101% notes maturing 2029 \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount					$ 700,000,000									$ 700,000,000
Debt instrument, interest rate, stated percentage					4.75%
Debt instrument, redemption price, percentage					101.00%
Term Loan Agreement \| Secured Debt
Debt Instrument [Line Items]
Repayments of long-term debt	$ 1,000,000,000.0		€ 600	$ 673,000,000
Senior note - 2.4% maturing 2019
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		2.40%
Repayments of long-term debt		$ 250,000,000
Senior note - 4.5% maturing 2018
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage						4.50%
Repayments of long-term debt						$ 363,000,000
Third Amended and Restated Long-Term Credit Agreement \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage							0.10%
Ratio of indebtedness to net capital							0.65
Debt instrument, covenant, rolling twelve month coverage ratio, minimum							3.0
Line of credit facility, maximum borrowing capacity										$ 3,500,000,000		3,500,000,000
Line of credit facility, increase										$ 500,000,000
Third Amended and Restated Long-Term Credit Agreement \| Line of Credit \| London Interbank Offered Rate (LIBOR) \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate							1.125%
Third Amended and Restated Long-Term Credit Agreement \| Line of Credit \| Prime Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate							0.125%
Accounts Receivable
Debt Instrument [Line Items]
Outstanding accounts receivable transferred under arrangements where the Company continues to service the transferred asset												$ 203,000,000			$ 161,000,000