Acquisitions - Net Assets Acquired (Details) - USD ($) $ in Thousands									12 Months Ended
	Jul. 01, 2021	Jun. 01, 2021	Apr. 30, 2021	Feb. 01, 2021	Oct. 01, 2020	Jul. 01, 2020	Mar. 02, 2020	Jan. 02, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill									$ 3,545,297	$ 3,512,567	$ 998,810
Significant Acquisitions In 2022
Business Acquisition [Line Items]
Cash									162
Accounts receivable									2,336
Inventory									771
Prepaid and other current assets									16
Equipment and other fixed assets									4,585
Goodwill									12,341
Identifiable intangible assets									500
Deferred tax assets									180
Accounts payable and accrued expenses									(3,130)
Contract liabilities									(134)
Net assets acquired									17,627
Cash payment									$ 17,170
Significant Acquisitions In 2021
Business Acquisition [Line Items]
Cash										36,993
Accounts receivable										126,902
Inventory										50,352
Prepaid and other current assets										7,736
Equipment and other fixed assets										274,357
Operating lease right-of-use assets										78,643
Goodwill										2,536,566
Identifiable intangible assets										132,900
Other assets										3,699
Deferred tax (liabilities)										(47,770)
Accounts payable and accrued expenses										(131,583)
Contract liabilities										(19,630)
Other current liabilities										(13,701)
Other long-term liabilities										(3,738)
Operating lease obligations										(78,643)
Finance lease obligations										(11,635)
Net assets acquired										2,941,448
Cash payment										1,657,970
AeroCare
Business Acquisition [Line Items]
Cash										27,686
Accounts receivable										71,916
Inventory										26,998
Prepaid and other current assets										3,522
Equipment and other fixed assets										190,755
Operating lease right-of-use assets										52,927
Goodwill										2,083,423
Identifiable intangible assets										122,800
Other assets										1,178
Deferred tax (liabilities)										(46,234)
Accounts payable and accrued expenses										(82,722)
Contract liabilities										(14,495)
Other current liabilities										(10,021)
Other long-term liabilities										(1,055)
Operating lease obligations										(52,927)
Finance lease obligations										0
Net assets acquired										2,373,751
Cash payment				$ 1,200,000						1,153,409
Spiro
Business Acquisition [Line Items]
Cash										2,132
Accounts receivable										5,756
Inventory										1,733
Prepaid and other current assets										152
Equipment and other fixed assets										6,897
Operating lease right-of-use assets										2,581
Goodwill										64,380
Identifiable intangible assets										1,000
Other assets										16
Deferred tax (liabilities)										0
Accounts payable and accrued expenses										(5,517)
Contract liabilities										(486)
Other current liabilities										0
Other long-term liabilities										0
Operating lease obligations										(2,581)
Finance lease obligations										(2,195)
Net assets acquired										73,868
Cash payment			$ 65,800							65,759
Healthy Living
Business Acquisition [Line Items]
Cash										579
Accounts receivable										5,838
Inventory										2,949
Prepaid and other current assets										1,088
Equipment and other fixed assets										1,188
Operating lease right-of-use assets										1,366
Goodwill										44,095
Identifiable intangible assets										1,500
Other assets										0
Deferred tax (liabilities)										0
Accounts payable and accrued expenses										(3,363)
Contract liabilities										(102)
Other current liabilities										(1,667)
Other long-term liabilities										0
Operating lease obligations										(1,366)
Finance lease obligations										0
Net assets acquired										52,105
Cash payment		$ 47,000								47,048
Agilis
Business Acquisition [Line Items]
Cash										1,131
Accounts receivable										0
Inventory										2,330
Prepaid and other current assets										0
Equipment and other fixed assets										348
Operating lease right-of-use assets										490
Goodwill										55,375
Identifiable intangible assets										500
Other assets										0
Deferred tax (liabilities)										0
Accounts payable and accrued expenses										(3,188)
Contract liabilities										0
Other current liabilities										0
Other long-term liabilities										0
Operating lease obligations										(490)
Finance lease obligations										0
Net assets acquired										56,496
Cash payment	$ 30,800									30,828
We Care
Business Acquisition [Line Items]
Cash										458
Accounts receivable										2,007
Inventory										465
Prepaid and other current assets										0
Equipment and other fixed assets										5,254
Operating lease right-of-use assets										970
Goodwill										35,971
Identifiable intangible assets										400
Other assets										0
Deferred tax (liabilities)										(1,228)
Accounts payable and accrued expenses										(1,389)
Contract liabilities										(783)
Other current liabilities										0
Other long-term liabilities										0
Operating lease obligations										(970)
Finance lease obligations										0
Net assets acquired										41,155
Cash payment	$ 34,800									34,834
Community
Business Acquisition [Line Items]
Cash										2
Accounts receivable										15,798
Inventory										5,214
Prepaid and other current assets										571
Equipment and other fixed assets										44,952
Operating lease right-of-use assets										4,412
Goodwill										88,393
Identifiable intangible assets										2,300
Other assets										2,505
Deferred tax (liabilities)										0
Accounts payable and accrued expenses										(13,725)
Contract liabilities										(3,156)
Other current liabilities										(180)
Other long-term liabilities										(2,683)
Operating lease obligations										(4,412)
Finance lease obligations										(4,768)
Net assets acquired										135,223
Other
Business Acquisition [Line Items]
Cash										5,005
Accounts receivable										25,587
Inventory										10,663
Prepaid and other current assets										2,403
Equipment and other fixed assets										24,963
Operating lease right-of-use assets										15,897
Goodwill										164,929
Identifiable intangible assets										4,400
Other assets										0
Deferred tax (liabilities)										(308)
Accounts payable and accrued expenses										(21,679)
Contract liabilities										(608)
Other current liabilities										(1,833)
Other long-term liabilities										0
Operating lease obligations										(15,897)
Finance lease obligations										(4,672)
Net assets acquired										208,850
Cash payment										$ 196,669
Significant Acquisitions In 2020
Business Acquisition [Line Items]
Cash											21,227
Accounts receivable											62,940
Inventory											26,111
Prepaid and other current assets											9,560
Equipment and other fixed assets											45,669
Goodwill											732,019
Identifiable intangible assets											122,100
Other assets											2,921
Deferred tax assets											1,132
Accounts payable and accrued expenses											(61,196)
Contract liabilities											(3,344)
Other current liabilities											(11,278)
Other long-term liabilities											(4,107)
Finance lease obligations											(2,206)
Net assets acquired											941,548
Cash payment											790,564
PCS
Business Acquisition [Line Items]
Cash											61
Accounts receivable											14,925
Inventory											0
Prepaid and other current assets											943
Equipment and other fixed assets											535
Goodwill											988
Identifiable intangible assets											0
Other assets											0
Deferred tax assets											0
Accounts payable and accrued expenses											(2,025)
Contract liabilities											0
Other current liabilities											(233)
Other long-term liabilities											(1,186)
Finance lease obligations											0
Net assets acquired											14,008
Cash payment								$ 14,000			14,008
Advanced
Business Acquisition [Line Items]
Cash											0
Accounts receivable											7
Inventory											2,727
Prepaid and other current assets											127
Equipment and other fixed assets											19,783
Goodwill											41,712
Identifiable intangible assets											600
Other assets											0
Deferred tax assets
Accounts payable and accrued expenses											(35)
Contract liabilities											(1,404)
Other current liabilities											0
Other long-term liabilities											0
Finance lease obligations											0
Net assets acquired											63,517
Cash payment							$ 58,500				58,517
Solara
Business Acquisition [Line Items]
Cash											12,069
Accounts receivable											17,411
Inventory											14,376
Prepaid and other current assets											2,113
Equipment and other fixed assets											3,473
Goodwill											347,718
Identifiable intangible assets											85,700
Other assets											0
Deferred tax assets
Accounts payable and accrued expenses											(22,464)
Contract liabilities											(167)
Other current liabilities											(4,835)
Other long-term liabilities											0
Finance lease obligations											0
Net assets acquired											455,394
Cash payment						$ 380,700					380,735
ActivStyle
Business Acquisition [Line Items]
Cash											4,993
Accounts receivable											5,158
Inventory											471
Prepaid and other current assets											955
Equipment and other fixed assets											992
Goodwill											49,643
Identifiable intangible assets											9,400
Other assets											0
Deferred tax assets											1,240
Accounts payable and accrued expenses											(7,155)
Contract liabilities											0
Other current liabilities											(185)
Other long-term liabilities											0
Finance lease obligations											0
Net assets acquired											65,512
Cash payment						$ 65,500					65,512
Pinnacle
Business Acquisition [Line Items]
Cash											1,193
Accounts receivable											4,174
Inventory											101
Prepaid and other current assets											612
Equipment and other fixed assets											0
Goodwill											107,706
Identifiable intangible assets											15,200
Other assets											2,921
Deferred tax assets											0
Accounts payable and accrued expenses											(5,777)
Contract liabilities											0
Other current liabilities											(350)
Other long-term liabilities											(2,921)
Finance lease obligations											0
Net assets acquired											122,859
Cash payment					$ 80,400						80,377
Other
Business Acquisition [Line Items]
Cash											2,911
Accounts receivable											21,265
Inventory											8,436
Prepaid and other current assets											4,810
Equipment and other fixed assets											20,886
Goodwill											184,252
Identifiable intangible assets											11,200
Other assets											0
Deferred tax (liabilities)											(108)
Accounts payable and accrued expenses											(23,740)
Contract liabilities											(1,773)
Other current liabilities											(5,675)
Other long-term liabilities											0
Finance lease obligations											(2,206)
Net assets acquired											220,258
Cash payment											$ 191,415