Revenue Recognition - Disaggregation Of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 337,920	$ 511,584	$ 1,138,015	$ 1,541,402
North America
Disaggregation of Revenue [Line Items]
Revenue	251,117	394,751	886,746	1,182,179
Europe
Disaggregation of Revenue [Line Items]
Revenue	86,803	116,833	251,269	359,223
Full service center-based child care
Disaggregation of Revenue [Line Items]
Revenue	220,136	410,789	768,833	1,267,689
Full service center-based child care | North America
Disaggregation of Revenue [Line Items]
Revenue	137,112	298,770	527,751	920,113
Full service center-based child care | Europe
Disaggregation of Revenue [Line Items]
Revenue	83,024	112,019	241,082	347,576
Back-up care
Disaggregation of Revenue [Line Items]
Revenue	93,050	80,059	303,121	214,802
Back-up care | North America
Disaggregation of Revenue [Line Items]
Revenue	89,271	75,245	292,934	203,155
Back-up care | Europe
Disaggregation of Revenue [Line Items]
Revenue	3,779	4,814	10,187	11,647
Educational advisory and other services
Disaggregation of Revenue [Line Items]
Revenue	24,734	20,736	66,061	58,911
Educational advisory and other services | North America
Disaggregation of Revenue [Line Items]
Revenue	24,734	20,736	66,061	58,911
Educational advisory and other services | Europe
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0