Summary of Debt Obligations (Table Footnotes) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Line Items]
2021	$ 2,243.6
2022	2,332.2
2023	2,643.9
2024	3,300.7
2025	3,159.6
Thereafter	23,880.8
Reclassification to Long Term Debt	268.9
Amounts outstanding	$ 37,440.4	$ 34,177.2

Debt Disclosure [Line Items]

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Short Term Obligations Reclassification to Long Term Obligations

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No definition available.

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

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-Publisher FASB
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-Topic 470
-SubTopic 20
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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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