Note 13 - Fair Value Measurements and Derivatives - Outstanding Fixed-to-fixed Cross-currency Swaps (Details) € in Millions, $ in Millions		Jun. 30, 2021 USD ($)	Jun. 30, 2021 EUR (€)	Dec. 31, 2020 USD ($)
Currency Swap [Member]
Notional amount		$ 1,117		$ 1,118
Currency Swap [Member] | Not Designated as Hedging Instrument [Member]
Notional amount		388
Currency Swap [Member] | Undesignated 2026 Swap [Member] | Not Designated as Hedging Instrument [Member]
Notional amount		$ 188	€ 169
Inflow rate		6.50%	6.50%
Outflow rate		5.14%	5.14%
Currency Swap [Member] | Undesignated Offset 2026 Swap [Member] | Not Designated as Hedging Instrument [Member]
Notional amount		$ 188	€ 169
Inflow rate		3.13%	3.13%
Outflow rate		6.50%	6.50%
Currency Swap [Member] | Cash Flow Hedging [Member] | Luxembourg Intercompany Notes [Member]
Face amount | €			€ 278
Notional amount		$ 300	€ 278
Inflow rate		5.38%	5.38%
Outflow rate		3.70%	3.70%
Rate		3.70%	3.70%
Senior Notes due April 15, 2025 [Member]
Rate	[1]	5.75%	5.75%
Senior Notes due April 15, 2025 [Member] | Currency Swap [Member] | Cash Flow Hedging [Member]
Face amount		$ 400
Rate		5.75%	5.75%
Notional amount		$ 400	€ 371
Inflow rate		5.75%	5.75%
Outflow rate		3.85%	3.85%

[1] In conjunction with the issuance of the April 2025 Notes we entered into 8-year fixed-to-fixed cross-currency swaps which have the effect of economically converting the April 2025 Notes to euro-denominated debt at a fixed rate of 3.850%. In conjunction with the issuance of the June 2026 Notes we entered into 10-year fixed-to-fixed cross-currency swaps which have the effect of economically converting the June 2026 Notes to euro-denominated debt at a fixed rate of 5.140%. See Note 13 for additional information.