Commitments and Contingencies - Investments in Affiliates and Other Entities (Details) $ in Millions	Dec. 31, 2019 USD ($)
Infrastructure Investors Partnership
Other Commitments [Line Items]
Contributions to partnership in connection with certain investments	$ 20.0
Capital for Infrastructure Projects
Other Commitments [Line Items]
Outstanding capital commitment	80.0
Infrastructure Investors Partnership \| Capital for Infrastructure Projects
Other Commitments [Line Items]
Outstanding capital commitment	$ 1,000.0

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant