Stockholders' Equity - Repurchase activity (Details)		3 Months Ended											12 Months Ended
	Dec. 08, 2025 shares	Dec. 31, 2025 $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) $ / shares shares	Mar. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2025 USD ($) shares	Dec. 31, 2024 USD ($) shares
Class of Stock
Number of Share Repurchases Requested														185,277
Shares Repurchased														80,687
Repurchase of common stock | $													$ 820,524	$ 797,838
Class K Common Stock
Class of Stock
Number of Share Repurchases Requested		78,008	40,889	32,542	20,042	42,948	40,088	142,529	56,794	52,823	10,274	59,587
Shares Repurchased			6,656	12,746	4,842	1,037	230	19,615	9,864	10,801	3,097	16,090
Amount of Shares Repurchased | $			$ 67,696	$ 129,628	$ 49,241	$ 10,511	$ 2,338	$ 199,490	$ 113,731	$ 124,535	$ 35,704	$ 184,422		10,511
Repurchase of common stock | $													$ 791,779
Average Amount per share | $ / shares			$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.53	$ 11.53	$ 11.53	$ 11.46
Requests Withdrawn				9,757
Repurchase Requests Outstanding		78,008	34,233										365,274
Number of outstanding and unfulfilled repurchase request		97											97
Class K Common Stock | Ninety-seven unfilled standard repurchases requests
Class of Stock
Repurchase Requests Outstanding													365,274
Class K One Common Stock
Class of Stock
Shares Repurchased				463	370	1,020	265	19,258	1,129	4,118	1,099	13,110
Amount of Shares Repurchased | $				$ 4,712	$ 3,762	$ 10,373	$ 2,694	$ 195,853	$ 11,485	$ 47,486	$ 12,675	$ 149,824		$ 10,373
Average Amount per share | $ / shares				$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.53	$ 11.53	$ 11.43
Requests Withdrawn						4,896								4,896
Repurchase Requests Outstanding				9,576
Class K Two Common Stock
Class of Stock
Shares Repurchased					685	1,662	1,946	19,879	891	912	596	4,654
Amount of Shares Repurchased | $					$ 6,961	$ 16,896	$ 19,786	$ 202,170	$ 9,062	$ 9,276	$ 6,868	$ 53,189		$ 16,896
Average Amount per share | $ / shares					$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.53	$ 11.43
Requests Withdrawn								2,457	9,183
Repurchase Requests Outstanding					14,145	34,333
Class K Three Common Stock
Class of Stock
Shares Repurchased							916	8,921	1,649	900	132	2,531
Amount of Shares Repurchased | $							$ 9,318	$ 90,730	$ 16,770	$ 9,155	$ 1,341	$ 29,078
Average Amount per share | $ / shares							$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.49
Requests Withdrawn									1,366
Repurchase Requests Outstanding									32,712
Class K Four Common Stock
Class of Stock
Shares Repurchased							1,695	1,762		1,665	130	559
Amount of Shares Repurchased | $							$ 17,241	$ 17,919		$ 16,942	$ 1,324	$ 5,678
Average Amount per share | $ / shares							$ 10.17	$ 10.17		$ 10.17	$ 10.17	$ 10.17
Repurchase Requests Outstanding							35,036			34,427
Class K Five Common Stock
Class of Stock
Shares Repurchased								3,260			241	535
Amount of Shares Repurchased | $								$ 33,157			$ 2,451	$ 5,438
Average Amount per share | $ / shares								$ 10.17			$ 10.17	$ 10.17
Requests Withdrawn												671
Repurchase Requests Outstanding								67,377			4,979
Class K Six Common Stock
Class of Stock
Shares Repurchased												989
Amount of Shares Repurchased | $												$ 10,062
Average Amount per share | $ / shares												$ 10.17
Repurchase Requests Outstanding												20,448
Common Class K, K-I, K-T
Class of Stock
Number of Share Repurchases Requested		78,596	49,097	32,542	25,042
Shares Repurchased		20,499	19,895	20,149	20,144
Average Amount per share | $ / shares		$ 10.17	$ 10.17	$ 10.17	$ 10.17
Class K-I Common Stock
Class of Stock
Number of Share Repurchases Requested	588		8,208		5,000	18,240			1,613	1,595		5,591
Shares Repurchased			379		123	439			158	244		1,101
Amount of Shares Repurchased | $			$ 3,853		$ 1,224	$ 4,464			$ 1,823	$ 2,675		$ 12,625		4,464
Repurchase of common stock | $													$ 28,475
Average Amount per share | $ / shares			$ 10.17		$ 9.92	$ 10.17			$ 11.53	$ 10.96		$ 11.47
Requests Withdrawn												1,036
Repurchase Requests Outstanding	588		7,829										32,295
Number of outstanding and unfulfilled repurchase request		97											97
Class K-I Common Stock | Ninety-seven unfilled standard repurchases requests
Class of Stock
Repurchase Requests Outstanding													32,295
Class K-I One Common Stock
Class of Stock
Shares Repurchased					119	433			35	140		1,041
Amount of Shares Repurchased | $					$ 1,207	$ 4,406			$ 356	$ 1,526		$ 12,003		4,406
Average Amount per share | $ / shares					$ 10.17	$ 10.17			$ 10.17	$ 10.9		$ 11.53
Class K-I Two Common Stock
Class of Stock
Shares Repurchased					220	801				30		370
Amount of Shares Repurchased | $					$ 2,234	$ 8,152				$ 296		$ 4,261		$ 8,152
Average Amount per share | $ / shares					$ 10.17	$ 10.17				$ 9.92		$ 11.52
Requests Withdrawn									1,420
Repurchase Requests Outstanding					4,538	16,567
Class K-I Three Common Stock
Class of Stock
Shares Repurchased										29		200
Amount of Shares Repurchased | $										$ 292		$ 2,309
Average Amount per share | $ / shares										$ 10.17		$ 11.55
Class K-I Four Common Stock
Class of Stock
Shares Repurchased										53		44
Amount of Shares Repurchased | $										$ 541		$ 451
Average Amount per share | $ / shares										$ 10.17		$ 10.17
Repurchase Requests Outstanding										1,099
Class K-I Five Common Stock
Class of Stock
Shares Repurchased												44
Amount of Shares Repurchased | $												$ 445
Average Amount per share | $ / shares												$ 10.17
Class K-I Six Common Stock
Class of Stock
Shares Repurchased												81
Amount of Shares Repurchased | $												$ 824
Average Amount per share | $ / shares												$ 10.17
Repurchase Requests Outstanding												1,674