Current Expected Credit Losses - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) lease	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, interest rate	4.70%	5.10%
Operating lease, weighted average remaining lease term	7 years 3 months 18 days
Finance lease, weighted average remaining lease term	9 years 2 months 12 days
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, term	2 years
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, term	10 years
IHOP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average interest rate	9.80%	9.90%
Notes Receivable Portfolio Segment | Applebee's
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and financing receivable, allowance for credit loss | $	$ 8.9
Equipment Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Operating lease, weighted average remaining lease term	5 years 6 months
Direct financing leases receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of properties subject to ground leases | lease	90
Finance lease, weighted average remaining lease term	4 years 1 month 6 days