Supplemental Data - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 17, 2017
Supplemental Data - Statements of Cash Flows
Cash paid for interest (including capitalized interest)	$ 778,448	$ 900,125	$ 921,238
Cash received for interest	5,945	40,795	15,037
Cash paid for income taxes	150,885	30,552	31,308
Capitalized interest (1)	924,644	980,299	1,012,177
Master Transaction Agreement, net of deferred tax of $166,161		497,145
Initial equity component of our 0% convertibles due 2025, net of deferred taxes of $99,823	$ 329,409
Interest rate (as a percent)	7.75%
Employee benefits paid in Class A common stock	$ 28,301	27,004	$ 27,322
Deferred other tax expense (benefit)	166,161	$ 166,161
Vendor financing	$ 74,895
2 3/8% Convertible Notes due 2024
Supplemental Data - Statements of Cash Flows
Interest rate (as a percent)	2.375%			2.375%
0% Convertible Notes due 2025
Supplemental Data - Statements of Cash Flows
Interest rate (as a percent)	0.00%
Deferred tax related to equity component of convertible notes	$ 99,823

Amount of deferred tax related to initial equity component of convertible notes.

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It represents the master transaction agreement, net of deferred tax.

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Cash outflow from vendor financing expenses.

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Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital.

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

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Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

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Amount of expense for employee benefit and equity-based compensation.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

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Amount of cash paid for interest capitalized, classified as investing activity.

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Interest received on loans and other debt instruments during the current period.

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