Goodwill And Other Acquired Intangible Assets - Estimated Future Amortization Expense for Acquired Intangible Assets Subject to Amortization (Detail) $ in Millions	Jun. 30, 2020 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020 (After June 30,)	$ 60
2021	117
2022	117
2023	112
2024	105
Thereafter	1,186
Total estimated future amortization	$ 1,697